VRS::LODNode Class Reference

#include <vrs/sg/lodnode.h>

Inheritance diagram for VRS::LODNode:

List of all members.

Public Member Functions
	LODNode ()
	constructs an empty LODNode
	LODNode (const SO< Iterator< double > > &distances, const SO< Iterator< SO< SceneNode > > > &nodes)
	constructs an LODNode with the given distances and corresponding SceneNode objects
void	append (double distance, const SO< SceneNode > &node)
void	remove (double distance)
	Removes the specified distance and the corresponding node.
void	clear ()
	Removes all distance/node-pairs.
unsigned int	size () const
	Returns the number of distance/node-pairs.
double	getDistance (unsigned int index) const
	Returns the distance for the node at the specified index.
SO< SceneNode >	getLodNode (unsigned int index) const
	Returns the node at the specified index (can return NULL).
SO< SceneNode >	getCurrentLodNode (double distance) const
	Returns the node for a specified distance (can return NULL).
virtual Bounds	boundingBox (Engine *engine) const
	Bounding box of the nodes.
virtual void	evaluate (Engine *engine)
	Evaluates the node corresponding to the current camera distance.
virtual SceneNodeVisitor::TraversalFlag	traverse (SceneNodeVisitor *visitor)
virtual void	modified ()
	Overridden to invalidate the m_bbox.
	VRS_TYPEINFO (LODNode, SceneNode)
	VRS_SERIALIZABLE (LODNode)
Protected Member Functions
virtual void	acceptChildren (std::vector< Visitable * > &appendChildrenHere) const
virtual double	getDistanceFromCamera (Engine *engine)
	Computes the distance to the current camera position.
Protected Attributes
Bounds	m_bbox

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Detailed Description

Node for level-of-detail rendering This node manages distance-node pairs. The first given node will be rendered if the distance of the center of the bounding box (union of all given shapes) with the camera position is between the first given distance and the second one. The n-th shape will be rendered if it's distance to the camera position is in the interval of the n-th with the (n+1)-th distance. The first distance usually should be 0.0. The distance-shape pairs will be re-ordered, so the given order doesn't matter. The node pointers can be NULL to omit rendering for certain ranges.

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Constructor & Destructor Documentation

VRS::LODNode::LODNode

(

)

constructs an empty LODNode

VRS::LODNode::LODNode	(	const SO< Iterator< double > > &	distances,
		const SO< Iterator< SO< SceneNode > > > &	nodes
	)

constructs an LODNode with the given distances and corresponding SceneNode objects

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Member Function Documentation

void VRS::LODNode::append	(	double	distance,
		const SO< SceneNode > &	node
	)

Inserts the given distance/node-pair into the already contained pairs, sorted by distance; node can be NULL.

void VRS::LODNode::remove

(

double

distance

)

Removes the specified distance and the corresponding node.

void VRS::LODNode::clear

(

)

Removes all distance/node-pairs.

unsigned int VRS::LODNode::size

(

)

const

Returns the number of distance/node-pairs.

double VRS::LODNode::getDistance

(

unsigned int

index

)

const

Returns the distance for the node at the specified index.

SO<SceneNode> VRS::LODNode::getLodNode

(

unsigned int

index

)

const

Returns the node at the specified index (can return NULL).

SO<SceneNode> VRS::LODNode::getCurrentLodNode

(

double

distance

)

const

Returns the node for a specified distance (can return NULL).

virtual Bounds VRS::LODNode::boundingBox

(

Engine *

engine

)

const [virtual]

Bounding box of the nodes.

Reimplemented from VRS::SceneNode.

virtual void VRS::LODNode::evaluate

(

Engine *

engine

)

[virtual]

Evaluates the node corresponding to the current camera distance.

Reimplemented from VRS::SceneNode.

virtual SceneNodeVisitor::TraversalFlag VRS::LODNode::traverse

(

SceneNodeVisitor *

visitor

)

[virtual]

A "visitor" can be sent through a scene graph, e.g., for detecting certain shapes or finding attribute objects etc. The visitor is informed about all shapes, attributes, and scene nodes encountered during a traversal.

Reimplemented from VRS::SceneNode.

virtual void VRS::LODNode::modified

(

)

[virtual]

Overridden to invalidate the m_bbox.

Reimplemented from VRS::SharedObj.

VRS::LODNode::VRS_TYPEINFO	(	LODNode	,
		SceneNode
	)

VRS::LODNode::VRS_SERIALIZABLE

(

LODNode

)

virtual void VRS::LODNode::acceptChildren

(

std::vector< Visitable * > &

appendChildrenHere

)

const [protected, virtual]

Reimplemented from VRS::Visitable.

virtual double VRS::LODNode::getDistanceFromCamera

(

Engine *

engine

)

[protected, virtual]

Computes the distance to the current camera position.

Parameters:

Engine * engine Engine evaluating the scene

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Member Data Documentation

Bounds VRS::LODNode::m_bbox [mutable, protected]

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The documentation for this class was generated from the following file:

• lodnode.h